JP2000289317A - Manufacture of seal surface of stamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To uniformly press an overall surface of a polymer of an original sheet formed with a pattern and a stamp sheet having open cell foams for allowing transmission of an ink under predetermined pressure to a transparent treating base, and to faithfully form an accurate seal surface to the pattern of an original. SOLUTION: The apparatus for manufacturing a seal surface of a stamp irradiates a polymer with a light, converts a light energy into a heat to close open cell foams of a stamp sheet, thereby forming an ink non-transmitting portion. In this case, the apparatus comprises a curved surface-like transparent treating base 20 for placing the polymer, a pressing member 40 having a belt 41 for pressing the polymer to the base 20 by deforming the curved surface shape, and a xenon flash lamp 30 for irradiating the polymer with the radiant light through the base 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for forming a stamp face on a stamp sheet using a porous resin having open cells.

[0002]

2. Description of the Related Art An ink impermeable portion is formed by closing open cells of a stamp sheet made of a porous resin having open cells allowing ink to pass therethrough, and a pattern of a stamp surface is formed by the remaining ink transmitting portions. Stamps that can be continuously stamped are known.

FIG. 8 schematically shows an example of a conventional stamping face manufacturing apparatus. A reflecting mirror 101 is provided below a light-transmitting processing table 102 such as a glass plate or an acrylic plate. A xenon flash lamp 100 is disposed, and the original sheet NS in which a pattern is formed by a light transmitting part and a light blocking part is formed, and a stamp sheet SS made of a porous resin having continuous cells that allows ink to pass therethrough. The superimposed polymer is placed on an original sheet NS.
Is placed on the light transmissive processing table 102 with the side facing downward.

Next, the polymer is pressed from above by a pressing member and pressed against the light-transmissive processing table 102. As the pressing member, a plate member having a large rigidity is used when the light-transmitting processing table 102 is in a plate shape, and when the light-transmitting processing table 102 is in a cylindrical shape, the surface of the member having an arc-shaped cross section is soft. What adhere | attached the pad which consists of an elastic body is used. And
When the xenon flash lamp 100 emits flash light, light energy is converted into heat on the original sheet NS or the stamp sheet SS, melting the surface of the stamp sheet SS, closing the open cells and forming an ink non-transmitting portion. You. The remaining portion is an ink transmitting portion in which the open cells are not closed, and the ink is transmitted through the ink transmitting portion so as to be imprinted on the stamp surface according to the pattern of the document.

[0005]

As described above, when the xenon flash lamp emits flash light and irradiates the polymer of the original sheet and the stamp sheet with light, the polymer is pressed against the light-transmissive processing table by the pressing member. However, in order to obtain a printed surface faithful to the pattern of the document, it is necessary to uniformly press the entire surface of the polymer against the light-transmitting processing table with a predetermined pressure. However, when the light-transmitting processing table is plate-shaped, it is difficult to manufacture the light-transmitting processing table and the plate member of the pressing member so as to be completely flat, and some distortion occurs. In addition, even when the light-transmitting processing table is cylindrical, it is difficult to manufacture a member in which the cross-section of the light-transmitting processing table and the pressing member has an arc shape so as to be a perfect circle with the same radius of curvature. , Which also has some distortion. For this reason, it is difficult to uniformly press the entire surface of the polymer against the light transmissive processing table with a predetermined pressure, and there is a problem that an accurate stamped surface that is faithful to the original pattern cannot be formed.

Therefore, according to the present invention, it is possible to uniformly press the entire surface of the polymer of the manuscript sheet and the stamp sheet against the light transmissive processing table with a predetermined pressure, and to form an accurate stamped surface faithful to the pattern of the manuscript. It is an object of the present invention to provide a stamp stamping surface manufacturing apparatus that can perform stamping.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, there is provided an original sheet in which a pattern is formed by a light transmitting part and a light shielding part, and a continuous sheet which allows the transmission of ink. Light is irradiated from the manuscript sheet side to a polymer in which a stamp sheet made of a porous resin having air bubbles is superimposed, and this light energy is converted into heat on the manuscript sheet or on the stamp sheet to change the surface of the stamp sheet. An apparatus for manufacturing a stamped surface of a stamp that melts and closes open cells to form an ink non-transmitting portion includes a curved light transmitting portion processing table on which a polymer of a manuscript sheet and a stamp sheet is placed; A pressing member having a belt for deforming the light-transmissive processing table into a curved shape and pressing the same, and a xenon flash for radiating light to irradiate the polymer through the light-transmitting processing table So as to comprise amplifier and, the.

It is preferable that the pressing member be provided with a belt tension adjusting mechanism.

[0009]

Embodiments of the present invention will be specifically described below with reference to the drawings. 1 and 2 show the external shape of the device. FIG. 1 is a plan view of the device, and FIG. 2 is a side view of the device. In FIG. 1 and FIG.
A cover 11 having an arc-shaped cross section is rotatably attached to the cover 11 by a hinge 13, and the cover 11 is opened and closed by operating an open / close lever 12 rotatably attached to the cover 11. As shown in FIG. 3, a lock cam 18 interlocking with the opening / closing lever 12 is attached to the lid 11, while a lock bar 19 is attached to the main body case 10, and the opening / closing lever 12 is turned. Lock cam 1
By locking 8 to lock bar 19, lid 11 is locked to main body case 10. A flash start button 14, a flash count selection button 15,
An emission energy adjustment volume 16 is provided.
A power switch 17 is arranged on a side surface of the main body case 10.

As shown in FIG. 3, a holding member 21 having an arc-shaped upper surface is arranged in the main body case 10. Then, on the holding member 21, a cylindrical light transmissive processing table 20 whose outer peripheral surface has the same radius as the upper surface of the holding member 21 is placed. The light transmissive processing table 20 is, for example, a glass tube having an outer diameter of 90 mmφ, a length of 120 mm, and a thickness of 5 mm. The top of the light transmissive processing table 20 protrudes from the main body case 10, and when the lid 11 is opened, the top of the light transmissive processing table 20 is exposed.

The lamp mounting plate 3 is provided inside the light transmitting member 20.
The rod-shaped xenon flash lamp 30 is held at both ends of the lamp mounting plate 32. That is,
The xenon flash lamp 30 is arranged inside the light transmitting member 20 along the longitudinal direction. The xenon flash lamp 30 is of a long arc type in which xenon gas is sealed, and has an inner diameter of 8 mm and an emission length of 110 mm. And the light emission period is 0.25H
The emission energy per z flash light emission is about 350J. The xenon flash lamp 30 is surrounded by a reflection mirror 31 having an inner surface provided with a mirror surface made of brilliant aluminum or the like, and the light of the xenon flash lamp 30 is emitted upward.

A pressing member 40 for pressing a polymer described below against the outer peripheral surface of the light-transmissive processing table 20 is provided inside the lid 11.
Is arranged. As shown in FIG. 4, the pressing member 40 includes a belt 41 wound around three fixed rollers 42 and one movable roller 43. Movable roller 43
Are arranged in the elongated hole 47 so as to be movable in the left-right direction. A pressing lever 45 having a spring receiving portion 45a and a pressing portion 45b is arranged rotatably around the fixed roller 42, and the pressing portion 45b is in contact with the movable roller 43. The pressure adjusting bolt 46 is inserted into a hole of the spring receiving portion 45 a of the pressing lever 45, and is screwed to a nut portion 48 fixed to the lid 11.
6, a coil spring 44 is interposed between the head of the lever 6 and the spring receiving portion 45a of the pressing lever 45. Therefore, the movable roller 4
3 is a pressing lever 45 to which the resilient force of the coil spring 44 acts.
4, the quadrilateral formed by the three fixed rollers 42 and the one movable roller 43 is pushed and spread, and the belt 41 is pressed in the direction of applying tension. Then, this pressing force can be adjusted by the screwing allowance of the pressure adjusting bolt 46. That is, when the pressure adjusting bolt 46 is screwed in, the coil spring 44 is compressed and strongly presses the movable roller 43, so that the tension of the belt 41 increases. 3 and 5 showing the state in which the lid 11 is open, the belt 41 is shown in an arc shape. However, when the lid 11 is opened, the belt 41 is not in an arc shape but in a loose state. There is no tension on the belt 41. Then, as will be described later, when the lid 11 is closed, the belt 41 comes into contact with the cylindrical light-transmissive processing table 20 to be in an arc shape, and tension is applied.

A pair of leaf springs 60 for holding the polymer before pressing the polymer against the outer peripheral surface of the light-transmissive processing table 20 by the pressing member 40 are arranged on the upper edge of the main body case 10. I have. In addition, a fan 50 that cools a lower portion of the light transmissive processing table 20 is disposed in the main body case 10.

As shown in FIG. 5, the polymer W is composed of a manuscript sheet NS in which a pattern is formed by a light transmitting portion and a light blocking portion, and a porous resin having open cells that allow ink to pass therethrough. The stamp sheets SS are overlapped with each other and sandwiched between two holders H made of two transparent films having one end welded.

Thus, with the original sheet NS facing down,
The polymer W is placed on the top of the light-transmissive processing table 20, and the polymer W
Are held by leaf springs 60, 60. Next, as shown in FIG. 6, the lid 11 is closed, the opening / closing lever 12 is rotated from the position shown by the dotted line to lock the lock cam 18 with the lock bar 19, whereby the lid 11 is locked to the main body case 10. You. As a result, the belt 41 of the pressing member 40 presses the polymer W against the outer peripheral surface of the light transmissive processing table 20, but the belt 41 is easily deformed along the curved shape of the light transmissive processing table 20, so that the light transmitting Even if the processing table 20 has a slight distortion, the entire surface of the polymer W is exposed to the light-transmitting processing table 2 at a uniform pressure.
Can be pushed to zero.

FIG. 7 shows the positional relationship between the lock cam 18 and the lock bar 19 in the process of locking the lid 11 to the main body case 10. The cam profile of the lock cam 18 has a gentle or mountain shape including an introduction portion A, a top portion B, and a lock portion C. When the lid 11 is closed, the lock bar 19 first comes into contact with the introduction portion A. At this time, the belt 41 of the pressing member 40 presses the polymer W against the outer peripheral surface of the light-transmissive processing table 20. When the open / close lever 12 is rotated from this state, the lock cam 18 is also rotated, and the lock bar 19 is located at the top B. At this time, the belt 41 is located at the lowest position, and the coil spring 44 is compressed most and the polymer W is pressed with the strongest pressure. When the opening / closing lever 12 is further rotated from this state, the lock bar 19 moves over the top B and is positioned at the lock portion C, and is stably locked. In this state, the coil spring 44 slightly extends, and the belt 41
However, the pressure adjusting bolt 46 is adjusted so that the tension at this time becomes an optimum value.

When the lid 11 is locked to the main body case 10, the interlock is released and the xenon flash lamp 30 is ready to emit flash light. When the number of times of light emission is selected with the number of times of light emission selection button 15 and the light emission energy is adjusted with the light emission energy adjustment volume 16 and the flash start button 14 is turned on, the xenon flash lamp 30 flashes light, and the light transmissive processing board is turned on. The light transmitted through 20 is irradiated on the original sheet NS of the polymer W.
At this time, the fan 50 is operating to cool the lower part of the light transmissive processing table 20.

Since the original sheet NS is formed by a portion that blocks the light and a portion that transmits the light, the stamp sheet SS corresponding to the portion where the light is transmitted by the irradiated light.
Becomes hot, the surface melts, the open cells are closed, and an ink non-permeable portion is formed. On the other hand, the portion of the original sheet NS that blocks the light is an ink-permeable portion because the open cells of the stamp sheet SS are not closed. That is, the same stamped surface as the pattern formed by the light transmitting portion and the light blocking portion of the document sheet NS is formed on the stamp sheet SS.
Since the polymer W is pressed against the light transmissive processing table 20 with a uniform pressure, it is possible to form a stamped surface faithful to the pattern of the document sheet NS.

Further, since the light-transmitting processing table 20 has a curved surface, when the polymer W is pressed against the outer peripheral surface of the light-transmitting processing table 20, the stamp sheet S that comes into contact with the original sheet NS is used.
A compressive stress is applied to the surface of S, and the open cells are compressed on the surface of the stamp sheet SS to reduce the opening.
Therefore, when light is irradiated by the xenon flash lamp 30, there is an advantage that air bubbles can be easily closed immediately by the heat of the heated portion of the document sheet NS.

[0020]

As described above, the stamp stamping surface manufacturing apparatus of the present invention comprises a curved light-transmitting treatment table on which a polymer of an original sheet and a stamp sheet are placed, The document includes a pressing member having a belt that deforms and presses the transparent processing table into its curved shape, and a xenon flash lamp that radiates light through the light transmitting processing table to irradiate the polymer. It is possible to uniformly press the entire surface of the polymer of the sheet and the stamp sheet against the light transmissive processing table with a predetermined pressure, and to form a stamping surface manufacturing apparatus capable of forming a precise and accurate stamping surface according to the original pattern. can do. Further, by providing a belt tension adjusting mechanism to the pressing member, the pressing force by the belt can be easily adjusted to an optimum value.

[Brief description of the drawings]

FIG. 1 is a plan view of the device.

FIG. 2 is a side view of the device.

FIG. 3 is a side view of the inside of the apparatus with a lid opened.

FIG. 4 is an explanatory diagram of a pressing member.

FIG. 5 is an explanatory view of a polymer and an arrangement state thereof.

FIG. 6 is a side view of the inside of the apparatus with a lid closed.

FIG. 7 is an explanatory diagram of a positional relationship between a lock cam and a lock bar.

FIG. 8 is an explanatory diagram of a conventional device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Main body case 11 Lid 12 Opening / closing lever 18 Lock cam 19 Lock bar 20 Light transmissive processing stand 21 Holding member 30 Xenon flash lamp 31 Reflection mirror 40 Pressing member 41 Belt 42 Fixed roller 43 Movable roller 44 Coil spring 45 Press lever 46 Pressure adjusting bolt 50 Fan 60 leaf spring W polymer NS manuscript sheet SS stamp sheet

Claims (2)

[Claims] An original is formed on a polymer obtained by superimposing a document sheet on which a pattern is formed by a light transmitting portion and a light blocking portion, and a stamp sheet made of a porous resin having open cells allowing ink to pass therethrough. Light is irradiated from the sheet side, this light energy is converted into heat on the original sheet or the stamp sheet to melt the surface of the stamp sheet, close the open cells and form the ink imprinted part of the stamp. In the manufacturing apparatus, there is provided a pressing device having a curved light-transmissive processing table on which a polymer of the document sheet and the stamp sheet is placed, and a belt for deforming the polymer into the curved surface and pressing the polymer on the light-transmitting processing table. A stamped surface of a stamp, comprising: a member; and a xenon flash lamp for irradiating the polymer with the emitted light passing through the light-transmissive processing table. Manufacturing equipment. 2. An apparatus according to claim 1, wherein said pressing member has a belt tension adjusting mechanism.